need help with some questions

[twbowhunter]

you guys helped with decodeing my 200 now i have a few more questions 1 : the head has a casting number of c6de-6090-bx5 is this the correct head for the motor? also this motor was suppose to have been rebuilt with very few miles on it,i pulled the head and pan and it is very clean and i can see cross hatching in the cylinders and there is not any wear on the parts at all,lifters, push rods,top of valve stems,ect ect, so my question is how far should i go with this? my thought was new oil pump,water pump,timeing chain,surface the head, put it back togeather and go,any other things i should look at? also will my dist and oil pan work with the 200? and is the clutch and pressure plate the same on both motors? this is for my sons bronco that we just finished a two year resto on and when i bought it i was told the motor was fresh so stupid me i left it alone and after 6 weeks of him getting to start driving it, it took a crap ! thanks in advance its nice to have a place to get this kind of help,by now means am i a motor guy!

 

[addo]

Inspect the oil and water pumps. No need to replace unless there is wear exceeding specs, or signs of leakage. Not sure if the oil pan will swap, nor the distributor. Check the hex drive shaft size for correctness.

If the vehicle is subject to higher RPM operation, you may wish to adjust the oil pump bypass spring by shortening it. This will reduce load on your distributor gear.

If you are to replace the timing set, the fully adjustable type is better, and will benefit by allowing "dial-in" of the cam timing.

That head is a 1966 casting - what year is the block? Flywheels have the same bolt pattern, and if they are the same type each (either flat or recessed) they interchange.

 

[twbowhunter]

sorry the block is a 1968 200 the motor that is in the bronco now is a 170

 

[twbowhunter]

found out today that the head on the 200 is junk, the machine shop said the head off the 170 is the same, is this true? can i use this on the 200? thanks again for the input

 

[addo]

The main things to check, are similar valve sizes per head type, and combustion chamber volumes. They physically will swap, but those two aspects mentioned, can vary.

 

[twbowhunter]

ok,now im at a crossroads, every one is telling me that im not going to see a power difference between the 170 that i now know was tired and never ran well, and a fresh built 200 and i should just bite the bullit and drop a 289 or 302 in it there are a lot of reasons i really want to keep the six and the main one is seeing people face when i pop the hood! am i asking to much to get 10 mph more from a fresh,bigger motor?

 

[x21]

ok,now im at a crossroads, every one is telling me that im not going to see a power difference between the 170 that i now know was tired and never ran well, and a fresh built 200 and i should just bite the bullit and drop a 289 or 302 in it there are a lot of reasons i really want to keep the six and the main one is seeing people face when i pop the hood! am i asking to much to get 10 mph more from a fresh,bigger motor?

Not very many on this forum will tell you to drop in a SBF in place of your inline 6. Depending on your time and budget, you can see gains with the six. Besides, youcant just 'drop in' a V-8 into an early 6 cyl mustang. Changes need to be made to the rest of the driveline, plus the other components, for safety's sake, should be upgraded (brakes!). Although, I will mention that its a good idea to upgrade those anyway if you build a stronger 6.
For me personally, the 6 is easy to work on. Although I've got V-8s in my other ponies, the 6 is where I really learned to delve into an engine. Simple design, everything is easy to access. This can be good if you are new to playing with motors. I was satisfied with my 6 and I didnt even put much into as some of other members here.
Anyway, good luck with whatever you decide, but we're here for ya if you decide to keep it inline (and even if you dont).

 

[wallaka]

ok,now im at a crossroads, every one is telling me that im not going to see a power difference between the 170 that i now know was tired and never ran well, and a fresh built 200 and i should just bite the bullit and drop a 289 or 302 in it there are a lot of reasons i really want to keep the six and the main one is seeing people face when i pop the hood! am i asking to much to get 10 mph more from a fresh,bigger motor?

I think that a fresh 200 will be much stronger than a worn-out 170. I seem to remember that we had a member here do dyno tests on an old 170 he had, and it had 60 hp or less at the wheels. The 200s that are being built here that have been dyno tested average 120 or so, and some way more, especially with some forced induction or the CI head.

Like x21 said, you have to upgrade nearly everything to put a 289-302 in. Plus I've seen tests where the average stock 289-2V dynoed at 120 hp or so. Not much of an upgrade, if you ask me, especially for all of the work it entails.

 

[twbowhunter]

droped off the block at the rebuilder today, he called and said he was going to have to go to 60 over (it already had 40 over pistons) but that he did not see a problem because the 200 was a beefy block, is this ok?

 

[twbowhunter]

come on guys i know you no the answer to this one

 

[wallaka]

60 is acceptable, but the limit.